|Publication number||US4143755 A|
|Application number||US 05/814,522|
|Publication date||Mar 13, 1979|
|Filing date||Jul 11, 1977|
|Priority date||Sep 29, 1975|
|Publication number||05814522, 814522, US 4143755 A, US 4143755A, US-A-4143755, US4143755 A, US4143755A|
|Inventors||Norman L. Keller|
|Original Assignee||Pullman Incorporated|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (11), Referenced by (30), Classifications (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This is a continuation of Ser. No. 617,901, filed Sept. 29 1975.
1. Field of the Invention
The present invention relates to the conveyer art and particularly to roller type of conveyers for transferring relatively flat objects such as sheet steel, etc.
2. Description of the Prior Art
The prior art is disclosed in such patents as U.S. Pat. Nos. 3,011,665, Dec. 5, 1961 and 3,782,527, Jan. 1, 1974. The present invention is an improvement over the prior art in utilizing a plurality of eccentrically mounted rollers for lifting objects moving on a roller conveyer and moving them laterally against a positive stop to properly align them during their longitudinal movement.
The primary object of the present invention is to provide an improved roller type of conveyer which includes an alignment mechanism adapted to be actuated for aligning flat objects such as sheet metal as they are traveling on a roller conveyer. The construction comprises a conventional roller type of conveyer which includes in the combination either clipped discs or eccentrically positioned rollers or wheels which are rotatable about axes disposed at right angles with respect to the axis of rotation of the roller conveyers. The discs or wheels are adapted to move into position beneath the plate or object which is carried on the conveyer and thereby raise the same and to move the object in a lateral direction whereupon it engages a stop. The stop is positioned to one side of the conveyer and as the plates are moved against the stop they are automatically aligned relative to each other as they travel on the conveyer. The stop may also be adjusted laterally so as to be offset in the event it is desired to position the objects at an angle as they are moving on the conveyer.
FIG. 1 is a perspective view of a portion of a conveyer showing an improved aligning device;
FIG. 2 is a plan view of the conveyer structure partially disclosed in FIG. 1;
FIG. 3 is a side elevation of the conveyer structure shown in FIG. 2;
FIG. 4 is a cross-sectional view taken substantially along the line 4--4 of FIG. 2;
FIG. 5 is a cross-sectional view taken substantially along the line 5--5 of FIG. 2;
FIG. 6 is a cross-sectional view taken substantially along the line 6--6 of FIG. 2;
FIG. 7 is a cross-sectional view taken substantially along the line 7--7 of FIG. 2;
FIGS. 8 and 9 are views similar to FIG. 7 showing the movement of an object on the conveyer as it is being aligned;
FIG. 10 is a partial plan view of a conveyer view similar to FIG. 2, showing a stop structure positioned in offset relation with respect to the conveyer;
FIG. 11 is a perspective view of a modified form of roller structure;
FIG. 12 is a side elevational view of the modified roller structure; and
FIG. 13 is a cross-sectional view taken substantially along line 13--13 of FIG. 12.
Referring now particularly to FIGS. 1, 2 and 3, a conveyer structure 10 is suitably supported on a floor or base 11 and includes longitudinally extending frame members 12 supported on the base 11 by means of feet supports 13. The longitudinally extending frame members 12 are interconnected by transversely extending support beams 14, longitudinally spaced along the conveyer structure. A plurality of journal brackets 15 are longitudinally spaced and supported on the top of the frame members 12 and support shafts 16 on which first roller members 17 are rotatable about transverse axes. A plurality of journal brackets 19 are laterally spaced and supported on the support beams 14 and support a plurality of longitudinal rotatable shafts 18. The shafts 18 therefore are disposed at right angles or perpendicular with respect to the axis of rotation of the shafts 16 of the first roller members 17. The shafts 18 have connected thereto for rotation therewith second alignment rollers 20. The said rollers as best shown in FIGS. 6, 7 and 8 being supported between the first roller members 17. The alignment rollers 20 are of the clipped disc type which includes an arcuate or cylindrical portion 22 and a relatively straight or clipped edge portion 21. Each of the shafts 18 has connected thereto sprockets 23 which are rotated and driven by a suitable chain drive arrangement 24 in turn actuated by a drive motor 25 which is supported in a depressed well 26 in the base 11. A drive sprocket 27 is driven by the drive motor 25 which in turn drives the chain drive arrangement 24 to provide for simultaneous rotation of all of the alignment rollers 20.
A positive stop structure is generally designated at 28 and is positioned along one side of the conveyer structure 10 as shown in FIGS. 1, 2, 3, 4, 5 and 10. The stop structure 28 comprises a plurality of upright brackets 29 having base plates 30 suitably supported on the base 11. Each base plate 30 is provided with a plurality of adjustment slots 31 and the plates are fastened to the base 11 by means of bolt and nut fasteners 32 as best shown in FIG. 5. The upright brackets 29 support a longitudinally extending beam 33 on which a plurality of longitudinally spaced stop rollers 34 are mounted. The stop rollers 34 are supported in brackets 35 and rotate about shafts 36 as best shown in FIGS. 4 and 5. Thus the rollers 34 are rotatable about a vertical axis as compared to the movement of the rollers 17 which are supported about a transverse axis and the alignment rollers 20 which are supported about a longitudinal axis.
A modified type of roller is disclosed in FIGS. 11, 12 and 13 and includes a central hub 38 which is connected to the shaft 18 for rotation therewith. A tire 39 of a softer material than steel, such as brass, etc., is supported on the hub 38 to rotatably slide relative thereto. Retainer plates 40 suitably retain the brass tire 39 on the hub structure 38. The plates 40 are connected to the hub 38 by means of bolt and nut connections 41 and a suitable lubricating fitting 42 is provided to lubricate the roller and thereby provide for free rotation of the tire 39 relative to the hub 38.
The objects being conveyed on the conveyer structure 10, as best shown in FIGS. 2, 6, 7, 8 and 10, are flat sheets 43 which may be steel or any other material which is desired to be conveyed. The type of objects 43 having a flat underneath surface are easily movable along the conveyer as they are directed by suitable conventional feeding devices emanating from an operating machine which has processed the metal plates or sheet. The alignment device disclosed is for the sole purpose of keeping the sheets in relative alignment so that they are properly maintained in their longitudinal course on the conveyer structure. As the sheets are moving along the conveyer in a longitudinal direction as best shown in FIGS. 6, 7 and 8, the clipped discs 20 or rollers are rotatable in a counter clockwise direction whereupon the sheet 43 is moved to the left from the position shown in FIG. 7, to the position shown in FIG. 8. As shown in FIG. 9, the sheet is moved laterally into engagement with the roller 34, whereupon the discs 20 lower the sheet 43 again onto the conveyer rollers 17. The sheets 43 then continue their movement in a straight direction properly aligned on the conveyer. The alignment rollers, of course, are functional when the arcuate portions of the rollers project upwardly above the conveyer rollers 17 as shown in FIG. 8. The clipped or flat surface 22 being disposed at all times below the top surface of the conveyer rollers 17. As shown in FIG. 7 the clipped discs or alignment rollers 20 initially engage the flat plate 43 and moves the same vertically upwardly and the sideways to the left as shown in FIG. 8 and as the alignment rollers turn further they begin to drop the plate 43 as shown in FIG. 9 onto the rollers 17 whereupon they continue their conveying movement in the direction desired. All of the alignment rollers move in unison at intervals so as to provide continuing alignment of the sheet as it is traveling along the conveyer. As best shown in FIG. 10, it may be desirable for the objects to be moved at an acute angle and it is a simple matter thereupon to change the positive stop 28 to accommodate this desired change in position. The brackets 29 are adjustable by virtue of slots 31 provided in the base plates 30 so that by simply loosening the bolt arrangement 32 and retightening them, the offset relation of the stop 28 can be achieved.
In the modified form of the alignment rollers shown in FIGS. 11, 12 and 13 the hub 38 is eccentrically positioned relative to the shaft 18 and this arrangement, of course, permits the rollers to be rotated upwardly into engagement with the plates or sheets 43 for raising them. The eccentric rollers lift the plate and roll it at right angles to the rollers of the conveyer. When the plate hits the positive stop the eccentric rollers or the clipped type rollers start to slide in reference to the plate. In the modified version, the tire 39 engages the underneath surface of the plate and the hub 38 may pivot relative to the tire 39. The eccentric action being such that the plate is also moved toward the positive stop structure. In the modified form of roller, the tire which may be of brass or similar softer material, prevents possible scratches to the material to be conveyed.
By the arrangement shown, the differential sliding of the eccentric rollers causes the plate to line up with the positive stop which is provided. By merely hitting the stop, the plate or sheet members are properly aligned relative to the conveyer and to each other. The advantages of the mechanism are that the device requires only rotation of components to produce a linear translation of a plate. The device also can transfer a plate in either direction by reversing the direction of rotation. Sliding of the plate only occurs when the positive stop is hit by the plate. The prior art also has included pusher type alignment devices which are frequently jammed and thus malfunction. During normal operation the present alignment device eliminates the pusher type structures and provides for positive alignment with the elimination of malfunction which occurs in structures of the prior art.
The foregoing description and drawings merely explain and illustrate the invention, and the invention is not limited thereto, except insofar as the intended claims are so limited, as those skilled in the art have the disclosure before them will be able to make modifications and variations therein without departing from the scope of the invention.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1178286 *||Nov 28, 1914||Apr 4, 1916||Gustav Edlund||Sheet-registering conveyer.|
|US1874675 *||May 18, 1929||Aug 30, 1932||Kieckhefer Container Company||Sheet handling device|
|US1883889 *||Jan 23, 1931||Oct 25, 1932||Daniel Manson Sutherland Jr||Apparatus for feeding and aligning sheet material|
|US2765065 *||Jun 23, 1951||Oct 2, 1956||Liebelt Adolph A||Dough lump spacer|
|US2815111 *||Nov 3, 1954||Dec 3, 1957||Internat Staple And Machine Co||Conveyer centering device|
|US2981399 *||Feb 26, 1958||Apr 25, 1961||Coe Mfg Co||Apparatus for handling rigid sheet material|
|US3415389 *||Sep 27, 1966||Dec 10, 1968||Chemcut Corp||Stacker|
|US3563721 *||May 24, 1968||Feb 16, 1971||Libbey Owens Ford Glass Co||Glass sheet supporting press bending and conveying apparatus|
|US3621973 *||Sep 18, 1969||Nov 23, 1971||Columbia Machine||Load-handling apparatus|
|US3670864 *||Aug 20, 1970||Jun 20, 1972||Moeller & Neumann Gmbh||Positioning device for aligning plates on a rollway|
|US3842962 *||Dec 21, 1972||Oct 22, 1974||Anikanov N||Apparatus for conveying piece articles,particularly stacks of newspapers,in perpendicular directions|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4430937 *||Mar 27, 1981||Feb 14, 1984||Koenig & Bauer Aktiengesellschaft||Front register lays for sheet-fed rotary printing machines|
|US5215302 *||May 28, 1992||Jun 1, 1993||Eastman Kodak Company||Registration mechanism for sheets of different sizes|
|US5238099 *||Aug 4, 1992||Aug 24, 1993||Premark Feg Corporation||Conveying system|
|US5577719 *||Sep 23, 1994||Nov 26, 1996||Ncr Corporation||Document alignment system|
|US5695186 *||Jan 11, 1996||Dec 9, 1997||Eastman Kodak Company||Apparatus and method for collating random arrays of sheets to ordered stacks|
|US5697608 *||Jun 26, 1996||Dec 16, 1997||Xerox Corporation||Agile lateral and shew sheet registration apparatus and method|
|US5911302 *||Nov 29, 1996||Jun 15, 1999||Cae Newnes Ltd.||Circulating paddle board positioning apparatus|
|US5967290 *||Aug 13, 1997||Oct 19, 1999||United Parcel Service Of America||High speed bobbin-type sorter for parcels|
|US6076653 *||Apr 29, 1997||Jun 20, 2000||United Parcel Service Of America, Inc.||High speed drum sorting conveyor system|
|US6182813||Apr 29, 1998||Feb 6, 2001||United Parcel Service Of America||Side conveyor disc including quick-change features|
|US6244420 *||Jun 21, 1999||Jun 12, 2001||Carbotech Inc.||Lumber positioner with vertically rotatable lateral displacement means|
|US6264042||Nov 15, 1999||Jul 24, 2001||United Parcel Service Of America, Inc.||Bilateral sorter|
|US6866139 *||Jul 31, 2003||Mar 15, 2005||Jolex Enterprises, Inc.||Conveyor system load transfer devices|
|US6901851||Sep 30, 2002||Jun 7, 2005||Maschinenfabrik Gerd Mosca Ag||Rotating mechanism for conveyor systems|
|US7255226||Dec 17, 2004||Aug 14, 2007||Jolex Enterprises, Inc.||Conveyor system load transfer devices|
|US7296674||Dec 3, 2004||Nov 20, 2007||Jolex Enterprises, Inc.||Conveyor system load transfer methods and apparatus|
|US7398874||Dec 20, 2005||Jul 15, 2008||Tgw-Ermanco, Inc.||Belt-driven accumulator for curved roller segment|
|US7604110||May 12, 2008||Oct 20, 2009||Tgw-Ermanco, Inc.||Belt-driven accumulator for curved roller segment|
|US7631746||Oct 11, 2007||Dec 15, 2009||9051-8127 Quebec Inc.||Board positioning system and method, and fence assembly|
|US8763789||Mar 8, 2013||Jul 1, 2014||Tgw Systems, Inc.||Drive system for curved roller conveyor segments|
|US20050072657 *||Jul 31, 2003||Apr 7, 2005||Lawless Robert Joseph||Conveyor system load transfer devices|
|US20050098411 *||Dec 17, 2004||May 12, 2005||Lawless Robert J.||Conveyor system load transfer devices|
|US20060151298 *||Dec 20, 2005||Jul 13, 2006||Deur Delwyn G||Belt-driven accumulator for curved roller segment|
|US20080210526 *||May 12, 2008||Sep 4, 2008||Deur Delwyn G||Belt-driven accumulator for curved roller segment|
|US20090095597 *||Oct 11, 2007||Apr 16, 2009||9051-8127 Quebec Inc.||Board positioning system and method, and fence assembly|
|EP1300350A1 *||Sep 24, 2002||Apr 9, 2003||Maschinen Fabrik Gerd Mosca AG||Rotating mechanism for conveyor systems|
|EP1749763A1 *||Jun 30, 2006||Feb 7, 2007||Bosch Rexroth Aktiengesellschaft||Conveyor having flat surfaces on segments of rollers|
|WO1997048627A1 *||Jun 16, 1997||Dec 24, 1997||Dunifon Thomas A||Aligning sheets by providing lateral motion|
|WO1998049080A2 *||Apr 29, 1998||Nov 5, 1998||United Parcel Service Of America, Inc.||Side conveyor disc including quick-change features|
|WO1998049080A3 *||Apr 29, 1998||Feb 18, 1999||United Parcel Service Inc||Side conveyor disc including quick-change features|
|U.S. Classification||198/456, 271/250, 198/598|